Formation evaluation using phase shift periodic pressure pulse t

Details Formation evaluation using phase shift periodic pressure pulse t Formation evaluation using phase shift periodic pressure pulse t

1996-03-13

1997-09-30

Brock, Michael

Measuring and testing

Borehole or drilling

Fluid flow measuring or fluid analysis

E21B 4900

Patent

active

056728190

ABSTRACT:
The present invention provides an apparatus and method for determining geologic formation properties. A pressure wave is generated by a reciprocating piston transmitted to the formation by a probe. The pressure is sensed by a high accuracy quartz gauge in the probe. This pressure is compared to the pressure sensed at a spaced probe or to the flow rate of the piston to calculate permeability or other formation properties.

REFERENCES:
patent: 2747401 (1956-05-01), Doll
patent: 3289474 (1966-12-01), Smith
patent: 4742459 (1988-05-01), Lasseter
patent: 5269180 (1993-12-01), Dave et al.

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